What is booklog CLAUDE.md?

A set of project instructions for Booklog, a self-hosted application for tracking books. It describes its Rust server, command-line client, web API, database, architecture, and required development checks.

Building and testing the application, running checks and formatting, adding database migrations, updating command-line features, and preparing a suitable commit message.

It gives coding agents the commands and project rules needed to make changes safely and keep documentation, database setup, tests, and formatting in sync.

How jnsgruk/booklog configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to jnsgruk/booklog. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/jnsgruk/booklog/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/jnsgruk/booklog

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/jnsgruk/booklog/claude-md/github.svg)](https://agentmods.dev/instructions/jnsgruk/booklog/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/jnsgruk/booklog/claude-md"><img src="https://agentmods.dev/badge/instructions/jnsgruk/booklog/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/jnsgruk/booklog/claude-md"><img src="https://agentmods.dev/badge/instructions/jnsgruk/booklog/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 3,337 This file is loaded in full into every session.

When invoked 3,337 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.03337	$0.03337
Opus 5.5	$0.01335	$0.01335
Sonnet 5.5	$0.00667	$0.00667
Haiku 4.5	$0.00334	$0.00334

Measured 2mo ago against content hash 16ce08a2b44b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

booklog CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

CLAUDE.md · 253 lines

How it starts

The opening of the file, as written. The whole thing — 253 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Claude Code Guidelines for Booklog

Project Overview

Booklog is a self-hosted book tracking platform built in Rust: HTTP server (Axum + Askama + Datastar), REST API, CLI client, SQLite database.

Build & Test Commands

prek run -av                      # All lints, tests, formatters
cargo build                       # Build
cargo test                        # Tests
cargo clippy --allow-dirty --fix  # Lint + auto-fix
nix fmt                           # Format
sqlx migrate add <name>           # New migration → migrations/NNNN_<name>.sql

Workflow Requirements

Before finishing any task, always:

Run prek run -av
Consider if the test coverage needs updating
Update README.md if the change adds/removes/renames CLI commands, env vars, or user-facing features
Update scripts/bootstrap-db.sh if the change affects CLI commands, flags, or entity fields used by it
Provide a draft commit message using Conventional Commits format

Architecture

Clean Architecture / DDD with four layers:

src/
├── domain/              # Pure business logic, no external deps
│   ├── errors.rs        # RepositoryError enum
│   ├── ids.rs           # Typed ID wrappers (AuthorId, BookId, ReadingId, etc.)
│   ├── listing.rs       # Pagination & sorting (SortKey, ListRequest, Page, PageSize)
│   ├── repositories.rs  # Repository traits
│   ├── countries.rs     # Country name → ISO code, flag emoji
│   ├── formatting.rs    # format_relative_time(), format_pages(), format_rating()
│   ├── books/           # authors, books (with BookAuthor), readings
│   ├── auth/            # users, sessions, tokens, passkeys, registration_tokens
│   └── analytics/       # timeline, stats, country_stats, ai_usage
├── infrastructure/      # DB, HTTP clients, third-party APIs
│   ├── repositories/    # SQL impls of repository traits (books/, auth/, analytics/)
│   ├── client/          # HTTP client for CLI
│   ├── ai.rs            # OpenRouter LLM integration
│   ├── backup.rs        # Database backup/restore
│   └── database.rs      # Database pool + SQLite pragmas
├── application/         # HTTP server, routes, middleware, services
│   ├── routes/          # Axum handlers (api/ for REST, app/ for web UI)
│   ├── services/        # Entity services (create + timeline event)
│   └── errors.rs        # HTTP error mapping
└── presentation/        # User interfaces
    ├── cli/             # CLI commands
    └── web/             # View models for templates

Read the full file on GitHub · 253 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

2mo ago First seen · 253 lines · 3,337 tokens per session scan A 16ce08a2b44b

Subscribe to this mod's changes

booklog CLAUDE.md is an instructions file published in the GitHub repository jnsgruk/booklog (10 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 3,337 tokens to every session, about $0.0133 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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booklog CLAUDE.md next to 6 instructions from other repositories
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booklog: Instructions file for Claude Code